St. Francis de Sales

St. Francis de Sales is a doctor of the Roman Catholic Church, who was active in the struggle against Calvinism and co-founded the order of Visitation Nuns. He is known also for his writings on the topic of spiritual direction and spiritual formation, particularly the Introduction to the Devout Life and the Treatise on the Love of God. In addition to his spiritual works, his writings include controversies against Calvinists, letters, sermons, and documents on diocesan administration.